Crushing or pulverizing mill.



0. A. DORN J; 0. LUDLAM & 0. 1?. & L. 0. BONNOT. GRUSHING OR PULVERIZING MILL. APPLICATION FILED AUG. 16, 1906.

952,885. Patented Mar. 22, 191-0.

7 SHEETS-SHEET a.

WITNESSES INVENTORS r wg G. A. BORN, J. 0. LUDLAM & (if. & L. C. BONNOT.

ORUSHING 0R PULVERIZING MILL. APPLICATION FILED AUG. 16, 1906.

Patented Mar, 22 1910.

7 minim-SHEET 4.

INVENTORS, cm W414 y'weww WITNESSES G. A. DORN, J. O. LUDLAM &'C. F. & L. G. BONNOT. GRUSHING OR PULVERIZING MILL. APPLICATION FIILBD AUG, 16, 1906.

952,85 v Patented Mar. 22, 1910.

7 SHEETS-SHEET 5.

4 0. A. DORN, J. 0. LUDLAM & 0. P. & L. c. BONNOT.

ORUSHING 0B. PULYERIZING MILL. APPLICATION FILED AUGJG, 1906 952,885, v Patented Mar. 22, 1910.

'7 SHEBTSSHEET 6.

I wn'nssses INVE-NTORS I /(91 7 44 C. 9W, W

0. A. DORNJ. 0. LUDLAM & c. F. & L. 0. BONNOT..

GRUSHING 0R PULVERIZING MILL.

APPLICATION FILED AUG.16, 1906.

Patented Mar. 22, 1910.

7 SHEETSSHEET '1.

v x lmvzai'roas Calm;

- YWII'IENIESSES H cnn'ron, cru -A conronsr'ron OF OHIO.

erumnns A. DORN, Jenn oruntaivr, AND CHARLES nonn'or, or CANTON, AND v,LoUIs cromror, or LO S ILLE, onro, ASSIGNORS 'ro' rnn'nonno'r COMPANY, or

CRUSHING on PULVEiRIZING MILL.

To all whom it may concernl' Be it known that we, CHARLES A. -DORN, JOHN O. LUDLAM, and CHARLES F. BONNOT, of Canton, Stark county, Ohio, and LOUIS C.

.BONNQT, of Louisville, Stark county, Ohio,.

have invented a new and useful Crushing or Pulverizing Mill, of which the following is a full, clear, and exact description, reference being had to the accompanying. drawings, forming part of this specificatioinin which Figure l is a sectionalside elevation showing the preferred form of our, improved mill on the irregular line I-- I of Fig. 2; Fig. 2 is a" central cross-section; Fig. 3 is a detail view of the curved deflector gand. guide; Fig. 4 is a similar view of the batfle and screen; Fig. 5 isa plahview of a roller driver; Fig. 61s a sectionon the irregular 1 line VI'.VI of Fig.f 5; Fig. '7 'is' a vertical section showing a modified form; Fig. 8 is a top plan View partly brokenawayyFigs. 9, l0 and 11 are details hereinafter referred t0; and Figs. 12 and 13 are views'similar to Figs. at and 5 showing another form of the roller driver. v

Our-invention relatesto the class'of'crushing or pulverizing machines, and is designed to provide a simple and eflicientmachine for such purpose which will pulverize materials rapidly and economically.

A further object of the invention is to prevent the discharge of dust from the ma-. chine, to make the machine readily accessible in all parts for repairs or changes, and

to provide for simple and cheap construction.

In the drawings, referringto the'form of Figs. 1 to 6, inclusive, we showa body or casing of general cylindrical form made up in longitudinally divided halves, the upperhalf. being made up of screening elements,

covered by plates 2, while the lower half is made up of thetransversely-divided parts 2. These parts are preferably flanged and bolted together, as shownin Figs. 1 and 2. Atthe bottom is an outlet port 3 formed between the casing sections and forming the lower endof the two oppositely-inclined WVithin the casing is which is preferably cast in one piece, and seats within recesses 1n the sections of the casing. The interior of this trackforms Specification of Letters Patent. Patented Mar. 22, 1910, Application filed August 16, 1 906. Serial No. 330,814.

'.traveling crushing rolls or wheels 5, of

which we have shown three, though any desired number maybeused. Each wheel or roll is mounted on a short shaft 6, extending through slots 7. in the opposite cover plates of the casing. The ends of these shafts are mounted in-bearing boxes 9 which slide within slot bearings in the oppc. roller drivers 10, one of which is shown in Fig. 5. Each of these roller. drivers consists of a ringeshaped carrier containing the non-radial sets of guides 11 for the bearings of the rollers, and each of the bearings 9 is provided with a cavity 9', which may be filled with a lubricant, for automatically oiling the bearings of shaft 6. Each driver is also provided with a hub extension 12 around which fits the hub 13 of the cover plate 14: containin the slot 7 in registry with the, bearings 0 the roller driver. These bearing plates may be secured in any desirable-manner, as by the screw-bolts 15. We preferably employ sets of springs 16 which normally press the roller bearings outwardly to hold them in position when the machine is at rest. Thescsprings have no material. function when the machine is in operation, since the rollers are then forced outwardly against the track by centrifugal force under the high speed imparted. A pair of the roller drivers is provided,-one on each sideof the casing, each driver being secured to the shaft 17, which may be driven through a belt connection, or in any other desirable manner. Each roller driver is preferably cast with a series of radial holes or pockets l8 forthe insertion of a rod or lever by which the rollers may be moved around to any point desired. Each side half of the casing is provided in its upper portion with a semi-annular cavity, whose lower inner ends communicate with the grinding chamber; and in each of these cavities, is .secured an annular deflecting from the pulverizing rolls, over the entire sieve proper.

surface of the screens. The material fed Fig. 4. This cover-plate-or ba'file will prevent the larger particles from injuring the We also preferably employ inclined revolving plows 24, which extend outwardly, and may be secured to the cover disks,these directing the larger particles of the material upon the track where it is acted upon by the rollers. or scoops serve not only to distribute the material, 'but'also to aid in creating suction preventing the discharge of dust into the room. The periphery of the cover plates 14 may be provided with slight diagonal depressions or recesses, for a free admission of air, wh1ch is drawn into the machine by these rapidly revolving .vanes or plows.-

These plows may be constructed as shown of one piece, having upturned sides bolted to the cover plates 14, or each cover plate may be rovided with an integral inwardly ex ten ing lug to form a part of the plow, and .to these lugs may be bolted a plate which will receive the wear. and can be easily replaced when worn out. At the lower part of the casing are provided cleaning-out pockets 25, having removable closures 26.

In the operation of the device, the material feeds from a suitable hopper or spout, not shown in our preferred form, into the grinding chamber, while the main shaft is driven at high'speed. Owing to the centrifugal action upon the rollers, whose bearings are free to move outwardly in a nonradial direction, these rollers will exert a pressure upon the circular 'rack as they roll thereon. circular paths, and exert a yielding pressure upon the material between them and the track 5 so that it is pulverized or crushed in a rapld and economical manner. Owing to the suction in the machine air isv drawninwardly and discharged down through the outlet opening with the grinding material.

The force of the moving parts of the machine wilh throw the round materialupwardly against the incllned faces of the defiector'plates 19 in the semi-annular cavities ofthe upper half of'the machine. This material dropping down by gravity will contact with the inwardly-inclined perforated bafiies, which will catch the unground products and return them to the crushing rolls; and the fine material will pass through the screens and drop down through the feed Out acted upon by the rollers.

These revolving plows as the material is. thrown against the sieves removable cap 28 forsealing the oil cavities;

They, therefore, more around inv channels 3'. i The coarsermaterial will follow down the inner face of the sieve and the inclined guides 19, shown in Figs. 1 and 3, and drop back into'the pulverizing chamber proper. We b lieve ourselves to be broadly new in these downwardly and inwardly inclined sieves with means for throwing the material upwardly and outwardly so that it drops back along such sieves. The vanes or plows aid in the action of discharging the 7-5 material upwardly for dropping through, the sieves. The perforated bafiles act'to protect the screens and to direct the larger particles backwardly where they are again While the above described form of machine is our preferred form, especially on' account of its large capacity and non-liability to clogging; at the same time, the machine may be made in other forms. Thus, in Figs. 7 to 11, we show another form wherein similar parts are designated by similar numerals with the lettera .applied. In this form the sieves are annular and are not inwardly and downwardly inac clined above the axis of the machine, as in the first form. In this case, the finer particles pass through the sieves by impact by the action of the plows and movingparts.

In Figs. 12 and 13, we show a cheaper and simpler form of the' roller driver. In the first form shown, each bearing is provided with a removable cover plate 27 having a and the construction involves quite an amount of machine work. In the present form of Figs. 12 and 13, the bearing box is made in one piece 3Qv with the oil cavity therein, and a single spring 31 is employed, L0

, the bearings being held in place by a single cover-plate. This cover-plate may be either in one integral piece or in two halves 32. In this case we show oiling holes closed by screw-plugs 3 3. 11

The machine is simple and economical in operation.' The peculiar position of the screens allows free discharge of the material from all parts of the chamber, while not interfering with the proper action of the grinding wheels. The perforated bafiles avoid injury to the screens, the roller drivers give even pressure upon the rollers from both sides, while allowing the free movement of the bearings under centrifugal force.

The peculiar arrangement of the down wardly and inwardly inclined screens in' the first form provides for a free outlet of the groundmaterial so that there is no liability to clogging. This is one of the important features of our improved machine.

The screens may be secured in many other ways, the bafiies may or may not be used, the

plows may or may not be employed, though we prefer to use them; and many other changes may be made without departing vided by a central deflector, and inclined screens or walls extending upwardly from the top or" the grinding chamber at each side of the deflector;-substantially as described.

2. In a crushing or grinding machine, a casing having .a grinding chamber, and a screening chamber located directly over the grinding chamber, said screening chamber having a deflector arranged directly above the point. of communication between the chambers, and an inclined screen wall in'the screening chamber at each side/ of the deflector, the screen .walls converging downwardly from the top of the screening chamber to the top of the grinding chamber; substantially as described.

3. In a grinding or pul'verizing machine, a casing having a grinding chamber and a screening chamber located directly above the grinding chamber, rotary grindingmeans in the grinding chamber adapted to throw the ground material upwardly into the screening chamber, a pair of inclined-screen walls in the screening chamber converging downwardly from the upper end thereof to the top of the grinding chamber, and means located between the screen walls for deflecting the material thrown upwardly into the screening chamber outwardly against said screen walls; substantially as described.

4. Ina grinding or pulverizing machine, a casing having a grinding chamber and a screening chamber located directly above the grinding chamber, rotary grinding means in the grindlng chamber adapted to throw the ground material upwardly into the screening chamber, a pair of inclined screen walls in the screening chamber converging downwardly from the upper end thereof, to the top of the g dingchamber, and means. located betw the screen walls for deflecting the in thrown upwardly. into th screening chamber outwardly against said screen Walls, said casing-having a feed openlng entering the upper part of the screenlng chamber and discharging therein at each side of the deflecting means; substantially as described.

5. In a crushing or grinding machine, a grinding chamber, a rotary grinder therein, a screening chamber arranged directly above the grinding chamber and into which the ground material is. thrown upwardly by the action of the rotary grinder, said screening chamber having a central deflector and side screens, the deflector being. arranged to defleet the material thrown upwardly by the grinder against the screens; substantially as described.

6 In a. roller grinding machine, a casin a circular track, a series of centrifugally acting rollers movable on the track, drivers for the'said rollers, said casing having a cavity in its upper portion at each side'of the traclr with the grinding plate 1:1 each of sald which communicates chamber,- a deflectin cavities, said plates fitting the track at their inner ends, and outwardly inclined therefrom, and screening elements parallel'with said plates, and separated therefrom by spaces into which the material isjthrown upwardly from the grinding chamber; substantially as described.

' 7. In a roller grinding machine, a circu lar track, a series of centrifugally acting rollers, outwardly diverging deflectors extending upwardly from the track, and

screening elements parallel with said dethe material is thrown upwardly from the grinding chamber; substantially as described.

In testimony whereof, we have hereunto set'out hands.

CHARLES A. DORN. JOHN O. LUDLAM. CHARLES r. noNNoT LOUIS C. BONNOT. Witnesses R. J. GOULD, Crisis. M. BALL.

flectors and between which and the deflectors 

